Kaspersky Endpoint Security data leak

Published September 1, 2026

Kaspersky's Endpoint Security software had a security hole that let attackers steal customer data. The company fixed it but warns users to check their accounts for suspicious activity.

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Medium
Involves
Kaspersky Endpoint Security

What is known

A flaw in Kaspersky Endpoint Security let attackers bypass security checks and steal customer data without needing a password.

What to do

Check if you're using Kaspersky Endpoint Security. If so, update to the latest version immediately.

the normal update channel and install the latest update for Endpoint Security, then review your account for any unauthorized access.

Reported details

September 1, 2026 Nightmare Eclipse Drops ‘HardBreacher’ Kaspersky Product Exploit Kaspersky told SecurityWeek that it patched the vulnerability affecting its Endpoint Security product.